LED display screens are becoming more and more popular, and can be seen everywhere in busy streets. Do you know what has the biggest impact on the performance of LED displays today? Anyone who knows the industry of LED displays knows that the biggest impact on display performance is LED lights. Here are eight factors that LED to the impact of LED lights on LED displays.
1. Perspective: the Angle of the LED display depends on the Angle of the LED light. Currently, outdoor LED screens mostly use water
Flat Angle of vertical Angle of view of 50 ° 100 °, elliptical LED, indoor LED display, choose horizontal vertical 120 ° of SMD leds. Display on the highway 30 ° Angle is generally selected due to its particularity of round LED is enough. Some high - rise LED displays have higher vertical angles. The perspective and brightness are contradictory to each other, and the great Angle inevitably reduces the brightness. The choice of perspective needs to be determined by specific USES.
2. Brightness: the brightness of LED lights is an important determinant of LED display brightness. The higher the brightness of the LED lamp,
The larger the residual current, it is beneficial to save energy consumption and keep the LED stable. Leds have different angles, and the smaller the Angle, the brighter the leds, but the smaller the Angle of the LED display. A 100 degree LED should be chosen to ensure a sufficient view of the LED display. A balance of brightness, Angle and price should be found for the screen with different spacing and different horizon.
3. Failure rate: due to the full color LED display by tens of thousands or even hundreds of thousands of set of red, green, blue three kinds of LED pixels, the failure of any color leds will affect the LED display the overall visual effect. Generally speaking, according to industry experience, the efficiency of the LED display will not be higher than three parts per thousand (the failure of the LED bulb itself).
4. Anti-static power: LED is a semiconductor device. It is sensitive to static electricity, which can easily lead to electrostatic failure. Therefore, the anti-static ability is very important to the life of LED display. Generally speaking, the test failure voltage of LED is not less than 2000V.
5. Lifespan: theoretical service life of the LED devices for 100000 hours, far more than other parts of LED display working life, so as long as the LED device quality guarantee, suitable working current, PCB thermal design is reasonable, LED display production process is rigorous, the LED devices will be LED display one of the most durable parts of the machine.
6. Attenuation characteristics: LED display will appear after long working hours, the brightness decrease and the color of the display color are inconsistent, mainly because of the brightness attenuation caused by the LED device. The attenuation of the LED brightness will reduce the brightness of the screen. The inconsistency of red, green and blue LED brightness attenuation will result in different color of LED display, which is what we often call screen screen phenomenon. High quality LED devices can control brightness attenuation well. By 1000 hours at room temperature light 20 ma standards, attenuation should be less than 2%, red, blue, green attenuation should be less than 10%, in blue, green LED display screen design as far as possible not to use when 20 ma current, had better use only 70% to 80% of the rated current.
7. Size: the size of LED device affects the pixel distance of LED display, i.e. resolution. More than 5 mm elliptic lamp is mainly used for P16 outdoor LED display, 3 mm elliptic lamp is mainly used for outdoor P12.5, P12, P10 display, type 3528 SMD leds is mainly used for indoor LED display, P6, P8 type 2020 SMD leds is mainly used for P2 and P3 indoor LED display, etc. Under the premise of constant point spacing, the size of the LED device increases, which can increase the display area and reduce the grain sense, but because the area of black area is reduced, the contrast will be reduced. On the contrary, the size of the LED decreases, the display area is reduced, the particle sense increases, the black area increases, and the contrast is increased.
8. Consistency: full color LED display is composed of thousands of red, green and blue leds of pixels, each color LED brightness, the wavelength determines the whole screen brightness consistency, the consistency of the white balance consistency, color uniformity. As is the Angle of the LED, to do the red, green, blue three kinds of LED brightness changes when matching consistency in different angles, encapsulated lens design, choice of raw materials is needed in the strict scientific design, this depends on the technical level packaging suppliers. The Angle of the LED lamp bead consistency features available LED Angle, a comprehensive test instrument to measure is particularly important for medium and top grade display, know the LED lamp bead on the influence factors of LED display, to choose a high quality LED display is very helpful.